Stone to Kilograms
1 stone = 6.3503 kilograms · 1 kg = 0.15747 st
1 stone = 6.3503 kilograms
How it’s calculated
kg = st × 6.35029318
- Multiply the value in stone by 6.35029318.
- To go back, divide by 6.35029318 (or multiply by 0.1574730444).
- 1 st = 6.35029318 kg · 1 kg = 0.1574730444 st
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 st = 6.35029318 kg. Source: NIST SP 811 / Handbook 44; BIPM SI Brochure (9th ed.).
Multiply by the factor written as a fraction
Put st in the denominator so it cancels, leaving kg.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 6.3503 kg
1 st in other units
Batch convert st → kg
- 1 st = 6.3503 kg
- 5 st = 31.751 kg
- 10 st = 63.503 kg
- 25 st = 158.76 kg
Quick examples
- 1 stone = 6.3503 kilograms
- 5 stone = 31.751 kilograms
- 10 stone = 63.503 kilograms
- 25 stone = 158.76 kilograms
- 100 stone = 635.03 kilograms
About these units
Stone (st)
British imperial
Exactly 14 lb = 6.350 293 18 kg. Common for body weight in the UK and Ireland.
1 st = 6.35029318 kg
Source: NIST SP 811 / Handbook 44
Kilogram (kg)
SI (metric)
SI base unit of mass, defined by fixing the Planck constant.
Base unit
Source: BIPM SI Brochure (9th ed.)
Stone to kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 0.1 st | 0.63503 kg |
| 0.5 st | 3.1751 kg |
| 1 st | 6.3503 kg |
| 2 st | 12.701 kg |
| 3 st | 19.051 kg |
| 4 st | 25.401 kg |
| 5 st | 31.751 kg |
| 6 st | 38.102 kg |
| 7 st | 44.452 kg |
| 8 st | 50.802 kg |
| 9 st | 57.153 kg |
| 10 st | 63.503 kg |
| 15 st | 95.254 kg |
| 20 st | 127.01 kg |
| 25 st | 158.76 kg |
| 30 st | 190.51 kg |
| 40 st | 254.01 kg |
| 50 st | 317.51 kg |
| 75 st | 476.27 kg |
| 100 st | 635.03 kg |
| 250 st | 1,587.6 kg |
| 500 st | 3,175.1 kg |
| 1,000 st | 6,350.3 kg |
Related conversions
Frequently asked questions
How do I convert stone to kilograms?
Use kg = st × 6.35029318. Multiply the value in stone by 6.35029318.
How many kilograms are in 1 stone?
1 stone (st) equals 6.3503 kilograms (kg); more precisely 6.35029318.
How many stone are in 1 kilogram?
1 kilogram (kg) equals 0.15747 stone (st); more precisely 0.1574730444.
What is 10 st in kg?
10 stone = 63.503 kilograms.
Is the stone a US or a UK unit?
This converter uses the British imperial stone. Exactly 14 lb = 6.350 293 18 kg. Common for body weight in the UK and Ireland. US and UK units with the same name can differ, so check which one your source uses.
What is a stone?
Exactly 14 lb = 6.350 293 18 kg. Common for body weight in the UK and Ireland.
What is a kilogram?
SI base unit of mass, defined by fixing the Planck constant.
Formula: kg = st × 6.35029318. Factors last reviewed 2026-10-27.